Changsha plastic water tank wholesale
Why is the chemical barrel deformed? 1. In actual use, the chemical barrel will be deformed due to the great difference in the thickness of the barrel wall. However, the machines used to make chemical barrels in China are relatively backward, and there are fewer control points for wall thickness, which results in the asymmetry of the barrel body. Therefore, when formulating the standards for chemical barrels, they are also relatively loose. In some cases, the two relatively symmetrical wall thicknesses are about 2:1. The chemical barrel with uneven wall thickness is often judged as qualified when dissecting. 2. According to relevant people, the ambient temperature is the main factor causing the deformation of plastic chemical barrel. We should control the ambient temperature of plastic chemical barrel to prevent it from deformation. The plastic chemical barrel can carry a high heat of 108 degrees, and a low heat of 70 degrees below zero. Therefore, in general, the temperature of the liquid carried by the plastic chemical barrel should be 40 degrees below zero to 60 degrees below zero. If this value range is exceeded, when the chemical plastic bucket device weighs more or the temperature is higher, protective measures should be taken for the plastic chemical bucket to avoid deformation of the plastic chemical bucket. 3. After the chemical drum is filled with liquid goods, after the lid is tightly rotated, because it is airtight, when the liquid inside is cooled, the pressure inside the drum becomes smaller, while the external pressure is larger, forming the pressure difference between the surface and the inside of the drum, causing the deformation of the chemical drum. The inspection procedure for chemical drums clearly stipulates that they should be sealed and airtight. If the liquid inside is dangerous goods, the chemical drums for Class I dangerous goods should be able to accept a pressure of 30Kpa/cm2, and the plastic drums for Class II and III dangerous goods should also be able to accept a pressure of 20Kpa/cm2.
Changsha plastic water tank wholesale
With the use rate of 200L large plastic barrels getting higher and higher, more and more old plastic barrels begin to appear gradually, including some plastic barrels that are broken during transportation, so we specially talk about how to repair the cracks on the plastic barrels. Now 200L plastic drums basically contract the transportation of chemical products, and the cost of plastic ton drums is also very high. If the old and damaged ton drums are replaced with new ones, the cost is too high. So let's talk about the repair of plastic buckets. Plastic buckets are indeed carriers for transporting chemical products, even dangerous plastic buckets, but they are not irreparable. The glue specially used to repair the plastic bucket is AB glue, which is composed of two kinds of glue liquids, one is hardener and the other is the glue. The combination of two liquids can achieve good bonding effect of zui, and the temperature must be appropriate. Although the use conditions are harsh, the bonding effect of the plastic bucket is extremely good. The 200L plastic bucket we usually use is always transported on the truck, and damage is inevitable during long-distance transportation. So many enterprises using plastic ton buckets will prepare sufficient AB glue.
Changsha plastic water tank wholesale
First, check whether the lid and barrel body of the plastic barrel are matched products when filling, otherwise if the lid and barrel body are not matched, the liquid may leak from the mouth. Liquid temperature shall not be higher than 70 ℃. The storage should be dark, the temperature should be below 40 ℃, and the temperature should not exceed 25 ℃ when loading and transporting. Do not load and transport the plastic packaging barrel immediately after filling the high-temperature liquid. Please do not drag the chemical barrel directly on the ground during the transportation of the filled liquid to avoid abrasion and bruise at the bottom. The correct method is to lift it with both hands or use a forklift wooden pallet for shipment.
Changsha plastic water tank wholesale
What are the functions of resin in plastic bucket production? In the same kind of plastics, when the filler content is high or the inorganic filler in the filler is increased, the shrinkage rate is small. The mold structure that is conducive to improving the molding pressure, increasing the plastic mold filling fluidity and making the plastic part dense can reduce the shrinkage rate of the plastic part. Any process factor that can make the plastic part dense and overflow the low molecular volatile matter before molding can reduce the shrinkage of the plastic part, such as preheating and pressurizing the phenolic plastic before molding. After heating, compacting and mixing in the barrel of the injection machine, the process of transforming loose powder or granular solid into continuous homogenized melt is called plasticization. Homogenization includes four aspects, that is, after the material is plasticized, the composition, density, viscosity and temperature distribution in the melt must be uniform. Metering refers to the preparation work that can ensure the injection machine to discharge the plasticized melt out of the barrel at a constant temperature, pressure and quantity through the plunger or screw, which needs the injection machine to control the plunger or screw during the plasticizing process.
Changsha plastic water tank wholesale
The common cooling shaping plastic barrel is the later stage of the injection molding process, starting from the freezing of the gate and ending with the demoulding of the product. At this stage, feeding or backflow will not continue, and the plastics in the cavity will continue to cool, harden and shape. When demoulding, the plastic parts have enough rigidity to prevent warping and deformation. The plastic bucket produced by this method has many advantages as well as some disadvantages. If the plastic bucket manufacturer will encounter a series of flow resistance in the injection process, part of the resistance comes from the external friction of the barrel, nozzle, mold gating system and mold cavity surface wall against the melt, and the other part comes from the viscous internal friction generated inside the melt itself. In order to overcome the flow resistance, the injection machine must apply a large injection pressure to the melt through the screw or plunger. This is not a big problem, as long as you pay attention to this problem can also be avoided!
